JPS5741379A - Blackening method for copper or copper alloy - Google Patents

Blackening method for copper or copper alloy

Info

Publication number
JPS5741379A
JPS5741379A JP11703780A JP11703780A JPS5741379A JP S5741379 A JPS5741379 A JP S5741379A JP 11703780 A JP11703780 A JP 11703780A JP 11703780 A JP11703780 A JP 11703780A JP S5741379 A JPS5741379 A JP S5741379A
Authority
JP
Japan
Prior art keywords
solar heat
alloy
soln
alkali
copper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11703780A
Other languages
Japanese (ja)
Inventor
Sadao Yamashita
Takao Machida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Mining and Smelting Co Ltd
Original Assignee
Mitsui Mining and Smelting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Mining and Smelting Co Ltd filed Critical Mitsui Mining and Smelting Co Ltd
Priority to JP11703780A priority Critical patent/JPS5741379A/en
Publication of JPS5741379A publication Critical patent/JPS5741379A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Landscapes

  • Chemical Treatment Of Metals (AREA)

Abstract

PURPOSE: To uniformly form a black oxide film with superior solar heat absorptivity on a molding of Cu or a Cu alloy by immersing the molding in a blackening soln. contg. caustic alkali and specified oxidizing agents.
CONSTITUTION: After degreasing and cleaning the surface of a warm water unit or the like made of Cu or Cu alloy as a body absorbing solar heat, the body is dipped in a nitric acid soln. having 300W320g/l concn. at ordinary temp. to smoothen the surface. The smoothened body is then immersed in an aqueous soln. contg. 20W40g/l NaOH or other caustic alkali, 5W10g/l alkali persulfate and 2W5g/l acid alkali sulfate as oxidizing agents at 50W90°C for 2W20min, thus forming a uniform black oxide film with high solar heat energy absorptivity and less radiation loss.
COPYRIGHT: (C)1982,JPO&Japio
JP11703780A 1980-08-27 1980-08-27 Blackening method for copper or copper alloy Pending JPS5741379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11703780A JPS5741379A (en) 1980-08-27 1980-08-27 Blackening method for copper or copper alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11703780A JPS5741379A (en) 1980-08-27 1980-08-27 Blackening method for copper or copper alloy

Publications (1)

Publication Number Publication Date
JPS5741379A true JPS5741379A (en) 1982-03-08

Family

ID=14701867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11703780A Pending JPS5741379A (en) 1980-08-27 1980-08-27 Blackening method for copper or copper alloy

Country Status (1)

Country Link
JP (1) JPS5741379A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7524702B2 (en) 2003-04-16 2009-04-28 Shinko Electric Industries Co., Ltd. Conductor substrate, semiconductor device and production method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7524702B2 (en) 2003-04-16 2009-04-28 Shinko Electric Industries Co., Ltd. Conductor substrate, semiconductor device and production method thereof

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